Merge pull request #1994 from mozilla/build-on-newer-python

Use a newer Python

Author: badboy

.circleci/config.yml

@@ -16,7 +16,7 @@ commands:
 parameters:
   python-version:
     type: string
-    default: "3.9.4"
+    default: "3.13"
 jobs:
   spellcheck:
     docker:
@@ -72,7 +72,7 @@ jobs:
       - run:
           name: Install Firefox related dependencies
           command: |
-            sudo add-apt-repository ppa:ubuntu-mozilla-daily/ppa
+            sudo add-apt-repository -y ppa:ubuntu-mozilla-daily/ppa
             sudo apt update
             sudo apt install firefox-trunk
       - run: